Self-assembled, ordered gold nanocrystal/silica thin films for prism-based surface plasmon resonance sensors

Author

Yang, Kai ; O´Brien, Michael J. ; Malloy, Kevin J. ; Sigmon, Thomas W. ; Fan, Hongyou ; Lopez, Gabriel P. ; Brinker, C. Jeffrey ; Sheik-Bahae, Mansoor

Author_Institution

Center for High Technol. Mater., New Mexico Univ., Albuquerque, NM, USA

Volume

2

fYear

2005

fDate

22-27 May 2005

Firstpage

1082

Abstract

Gold nanocrystal(NC)/silica films are synthesized through self-assembly of water-soluble gold nanocrystal micelles and silica by sol-gel processing. Absorption and transmission spectra show a strong surface plasmon resonance absorption peak at ∼520 nm. Angular excitation spectra of surface plasmon show a steep dip in the reflectivity curve at ∼65° depending on the thickness and refractive index of the gold NC/silica film. A potential SPR sensor with enhanced sensitivities can be realized based on these gold NC/silica films.

Keywords

gold; nanostructured materials; optical films; optical sensors; reflectivity; self-assembly; silicon compounds; sol-gel processing; surface plasmon resonance; Au; SiO₂; absorption spectra; angular excitation spectra; film thickness; ordered gold nanocrystal-silica thin films; prism-based surface plasmon resonance sensor; reflectivity curve; refractive index; self-assembly; sol-gel processing; transmission spectra; water-soluble gold nanocrystal micelles; Absorption; Gold; Nanocrystals; Optical films; Plasmons; Reflectivity; Resonance; Self-assembly; Silicon compounds; Thin film sensors;

fLanguage

English

Publisher

ieee

Conference_Titel

Quantum Electronics and Laser Science Conference, 2005. QELS '05

Print_ISBN

1-55752-796-2

Type

conf

DOI

10.1109/QELS.2005.1549037

Filename

1549037